Coated molten metal filters

Details Coated molten metal filters Coated molten metal filters

1990-06-22

1992-04-14

Robinson, Ellis P.

Liquid purification or separation

Filter

Material

75568, 164134, 164358, 266230, 266227, 428408, 428116, 4283184, 428457, C22B 1500, B22C 908, B01D 3920, B22B 900

Patent

active

051045400

ABSTRACT:
A molten metal filter is disclosed having a carbon or carbon-thermite coating that reduces thermal shock to the filter, and protects the filter from corrosion from the metal or components and impurities in the metal, and prevents metal from freezing in the filter. A molten metal assembly suitable for casting molten metal is disclosed which comprises a filter for molten metal and means for molten metal flow passage leading through the filter. The means have surfaces defining a molten metal path. The filter has a coating of carbon or carbon in intimate contact with a thermite material on the surface of the filter. A process is disclosed for filtering molten metal which comprises passing molten metal through the above described coated filter.

REFERENCES:
patent: 1596888 (1926-08-01), Pacz
patent: 4152141 (1979-05-01), Steinegger
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patent: 4591383 (1986-05-01), McGarry et al.
patent: 4610832 (1986-09-01), Brockmeyer
patent: 4681624 (1987-07-01), DeAngelis et al.
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patent: 4708740 (1987-11-01), Tungatt et al.
patent: 4713180 (1987-12-01), Hofmann et al.
patent: 4802527 (1989-02-01), Brockmeyer et al.
patent: 4946592 (1990-08-01), Galaj et al.
patent: 5022991 (1991-06-01), Day et al.
patent: 5033531 (1991-07-01), Fisher et al.

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